The power input range of a power bank is 1-2.4 amp. The bigger the input, the fast it will charge. A wall charger is very fast as it delivers 2.4 amp. To charge, connect the cable to the input port and then connect it to the wall charger, standard USB, or another power source.
20W Fast Charging Input - The powerbank itself can get charged in 7 to 8 hours as it has Power Delivery Technology that supports 20W fast charging input via Type C port. Charge 3 devices - With 2 USB ports and 1 Type C port for output, it can charge 3 devices at the same time & It comes with a 6 months warranty against manufacturing defects. The BioLite SolarPanel 5+ is a 5-watt solar panel with a small 3,200 mAh battery bank built into its ultralight portable design. We tested a lot of battery banks with an integrated solar panel, but most of those don't work very well to charge via sunlight. This is the only solar panel with an integrated battery that has relatively fast chargingThis power bank is a high-performing beast and it allows you to charge your device multiple times with its large battery capacity. Boasting of a massive 20000 mAh power bank will last you for a long duration and can charge your devices way faster with its single-port Fast Charge support.
OtterBox USB-A, USB-C, 20000 mAh Fast Charge Power Bank $55 at OtterBox Best Portable Charger for Apple Users Belkin BoostCharge Pro Fast Wireless Charger $100 at www.belkin.com Best .